Air filtration apparatus



FIG. 1 is a front, top perspective view of an ornamental design for an air filtration apparatus according to the present invention;

FIG. 2 is a left side elevational view of the air filtration apparatus of FIG. 1 ;

FIG. 3 is a right side elevational view of the air filtration apparatus of FIG. 1 ;

FIG. 4 is a rear elevational view of the air filtration apparatus of FIG. 1 ;

FIG. 5 is a front elevational view of the air filtration apparatus of FIG. 1 ;

FIG. 6 is a top plan view of the air filtration apparatus of FIG. 1 ; and,

FIG. 7 is a bottom plan view of the air filtration apparatus of FIG. 1 .

The broken lines shown in the figures are for the purpose of illustrating portions of the air filtration apparatus that form no part of the claimed design. 

CLAIM The ornamental design for an air filtration apparatus, as shown and described. 